Begin by filling a tall glass with ice. Add lemon juice, grapefruit juice, gin, and grapefruit soda.
Stir to combine.
Top with a splash of club soda and a slice of grapefruit as an optional garnish.
Notes
Flavor variations - You may swap a different flavor of juice or soda for a slight variation.
Garnish ideas - This is a low-key drink that doesn't even need a garnish. However, feel free to garnish with what you have on hand, such as a slice of citrus fruit or a maraschino cherry. I love it served with fresh grapefruit as it hints at the fresh juice used in our recipe.
Finnish Gin - For the most authentic version, choose a gin made in Finland.